A Second Life user named Bunnys Fride visiting the Jules Verne Museum in Nantes, France saw my painting of the "lepidopter" flying machine and asked if he could create it for Second Life. It's now available for free from the marketplace there.
(Video Link) Natascha made this video of the contraption in action.
Thanks, Bunnys Fride.
Previously on GurneyJourney: